Applied Catalysis2022，Vol.30910.DOI:10.1016/j.apcatb.2022.121293

Cobalt-intercalated one-dimensional nanocrystals of urea perylene imide polymer for enhanced visible-light photocatalytic water oxidation

Cao, Aihui Li, Renfu Xu, Xiao Huang, Weifeng He, Ying Li, Junqiang Sun, Miao Chen, Xueyuan Kang, Longtian
Applied Catalysis2022，Vol.30910.DOI:10.1016/j.apcatb.2022.121293
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  • NSTL
  • Elsevier

Cobalt-intercalated one-dimensional nanocrystals of urea perylene imide polymer for enhanced visible-light photocatalytic water oxidation

Cao, Aihui 1Li, Renfu 1Xu, Xiao 1Huang, Weifeng 1He, Ying 1Li, Junqiang 1Sun, Miao 1Chen, Xueyuan 1Kang, Longtian1
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作者信息

  • 1. Chinese Acad Sci
  • 折叠

Abstract

Urea perylene imide polymer (UPDI) is successfully recombined with Co(NO3)(2) molecules into one-dimensional nanocrystals (Co-UPDI) for enhanced photocatalytic oxygen evolution (POE) under visible light. Co-UPDI as photocatalyst exhibits more an order of magnitude of POE rate than UPDI at pH = 4.8 (8.00 vs. 0.58 mmol h(-1)g(-1)), which is the highest among reported POE tests in aqueous colloid system with AgNO3 as sacrificial agent. The apparent quantum yield (AQY) reaches 4.39 % at 450 nm. The systematical experiments reveals that the heterojunction formation between UPDI line and Co(NO3)(2) molecules is crucial through the coordination of Co with N atoms. Consequently, the rigidity of UPDI line enhances, H-type stacking of PDI moiety becomes closer, and CoOOH as cocatalyst in-situ forms during POE. Meanwhile, more excitons with longer lifetime generate and more quickly transfer in Co-UPDI than UPDI nanocrystals. This work provides an efficient strategy for photocatalytic water oxidation.

Key words

Photocatalysis/Urea perylene imide/Cobaltous nitrate/One-dimensional nanocrystal/Water oxidation/HIGHLY EFFICIENT/REDUCTION/EVOLUTION/PERFORMANCE/HYDROGEN

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出版年

2022
Applied Catalysis

Applied Catalysis

ISSN：0926-3373
被引量9
参考文献量48
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